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Water Safety Plans & Catchment Management. What is a WSP?. A way to ensure safe drinking-water by: Knowing the system thoroughly Identifying where and how problems could arise Multibarrier approach - Putting barriers and management systems in place to stop the problems before they happen

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Presentation Transcript

What is a WSP?

  • A way to ensure safe drinking-water by:
      • Knowing the system thoroughly
      • Identifying where and how problems could arise
      • Multibarrier approach - Putting barriers and management systems in place to stop the problems before they happen
      • Making sure all parts of the system work properly
  • A comprehensive risk assessment and risk management approach that encompasses all steps in water supply from catchment to consumer
  • Fits within a framework for safe drinking-water

National Government



Regional or local Government

  • Focus is on Water Supplier

Catchment managers

Community & consumer groups

Water supplier


Raw water catchment

Local builders, plumbers & water fittings suppliers

National/regional water associations

Catchment Users

National associations dealing with builders, plumbers, retailers & manufacturers


Overview of Water Safety Plans

Revise WSP following incident (Module 11)

Assemble team

(Module 1)

Describe the water supply system (Module 2)

Identify the hazards & assess the risks

(Module 3)

Plan & carry out periodic WSP review (Module 10)



Determine & validate control measures, reassess & prioritize risks (Module 4)

System assessment

Develop supporting programmes

(Module 9)


Management & communication

Develop, implement & maintain an improvement plan (Module 5)


Prepare management procedures

(Module 8)

Verify the effectiveness of the WSP (Module 7)

Define monitoring of control measures (Module 6)

wsps and catchment management
WSPs AND Catchment Management
  • Part of WSP process is identifying hazards and assessing risk
      • Identify all hazardous events that could contaminate, compromise or interrupt supply
      • Identify all potential hazards in supply chain (from source to tap)
      • Evaluate the risks associated with each hazard/hazardous event
  • Examples
    • Heavy rainfall (hazardous event) may promote the introduction of microbial pathogens (hazards) into the source water
    • Flooding can result in damaged infrastructure
    • Drought can compromise water supply and water quality

Emphasis on treatment for water quality

Water utilities range of control


Barriers / Control Measures






Better catchment management

  • Catchment management improves water supply downstream (quantity and quality)
      • Increase source water quality – OR – ensure source water quality does not deteriorate
      • Decrease intensity of treatment processes – reduce costs (chemicals, energ)
      • Decrease the necessity to seek new water resources (time and money)
      • Decrease water quality variance – more predictable quality
  • Understanding flood and drought hazards enables better planning for infrastructure investment (e.g. storage and networks), risk mitigation measures (e.g. urban storage and drainage)

Linking catchment Management and WSP

Identify key catchment stakeholders

Verify effectiveness of catchment controls

Map and characterise catchments

Develop catchment partnerships

Promote catchment risk mitigate measures

Identify hazards and hazardous activities

Flood and drought information is needed

Develop catchment warning and response procedures

Assess risks which could compromise treated water quality

Implement risk based raw water monitoring

Balance between need for enhanced treatment and likely effectiveness of catchment controls

Assess need for improved treatment to reduce risk


Catchment partnerships

Policy and Legislation

National / regional level

Water Associations

Water Associations

Water Associations

Local implementation

Catchment managers

Catchment ‘users’

Water Supplier

Catchment Level


Development of tools to incorporate impacts of climatic variability and change, in particular floods and drought, into basin planning processes

project rationale
Project rationale
  • Climatic variability and change is increasing in the form of more frequent, severe and less predictable floods and droughts
  • Growing sense of urgency among countries, basin organizations and other end users such as utilities to build resilience towards floods and droughts
  • Risks related to hydrologic uncertainty is magnified in transboundary contexts, where cooperation among countries is essential to any coping strategy.
project background
Project Background
  • Initiated by the Global Environment Facility (GEF) secretariat and UNEP to look at methodologies for addressing extreme weather events
  • Partners – IWA, DHI and UNEP
    • DHI – expertise on development of tools for water managemnet
    • IWA – engaging with key end users (especially utilities) to develop and test methodology
  • GEF needs to develop a tool to better address floods and drought issues in its portfolio
    • more than 50 IWRM-related projects in 30 lake and river basins throughout the world.
    • GEF projects have shown flood and droughts to be a priority transboundary concern, along with the other multiple drivers that cause depletion and degradation

Project Goal

  • The project aims at contributing to the global efforts being made to maintain acceptable levels of societal and ecosystem sustainability vis-a-vis growing climatic uncertainty and unpredictability.

Project Objective

  • Improve the ability of land, water and urban area managers operating in transboundary river basins to recognize and address, as part of the TDA-SAP, IWRM plans and water safety plans processes, the implications of the increased frequency, magnitude and unpredictability of flood and drought events
project outputs
Project outputs
  • Developing a generic methodology for basins, which uses tools and decision support systems that integrate information on floods and droughts to:
    • Transboundary Diagnostic Analyses and Strategic Action Plans
    • IWRM and Water safety plans.
  • Based on an assessment of present approaches, and developed through consultation with stakeholders
  • Combination of learning and pilot transboundary basin
  • Pilot Basins – Direct testing of generic methodology to incorporate floods and droughts into planning
      • Lake Victoria, Volta, Chao Phraya
  • Learning Basins – Consultations to understand how DSS are being applied and used in planning and what can be improved
      • Danube
    • Identify main water management issues and use these as a starting point for discussion
    • Opportunity to take stock of how the basin is managing flood events, what are the gaps and what can be developed in the future
what is the methodology
What is thE“methodology”?
  • Most advanced commercially available Decision Support Systems (DSS) combine databases, models, GIS and web technologies with configurable decision logics.
  • Information is processed in such a way to produce various scenarios to make informed decisions
  • Project will develop open access modules to allow the integration of flood and drought elements and of likely climatic scenarios into more commonly used DSSs, and apply them to IWRM planning, to the TDA process, and to WSPs.
stakeholder engagement
Stakeholder Engagement
  • Emphasis is to be placed on the management of floods and droughts affecting urban and industrial areas that are the centers of economic growth, assets and wealth creation.
    • Links with utilities and WSPs that incorporate catchment management
    • WSP will complement wider basin planning and provide in depth engagement with end users
    • Provides opportunity for awareness raising on river basin management benefits at local level (urban and industrial)

Risks and Hazards

  • What specific risks and hazards around floods and droughts, have you encountered which you would like to include in planning processes?
  • What kind of information do you currently gather around floods and droughts (quantitative and qualitative) in the TDA/SAP process?

Decision support systems

  • What type of decision support tools (especially for floods and droughts) are you familiar with? How are using them?
  • What type of outputs do you use or are you looking for from a DSS which focuses on floods and droughts? How would use information from a DSS in a TDA process and planning?

Stakeholder engagement

  • How do you engage with other stakeholders at local level (e.g industries, utilities, etc)?